Paving machine



K. A. LQNDSTROM Mar. 3, 1925.

PQVING MACHINE Filed Sept. 1s

1922 4 Sheets$heet O 0 9o MN m QQ N mk N I fiVerzZor Mar. 3. 1925.527,983 1 K. A. LUNDSTROM I PAVINGTMACHINE Fild Sept."l8'=", 1922 4 shets-sheet 2 Mar; 3, 1925. K. A. LUNDSTROM PAVING MACHINE Filed Sept. '181922 4 Sheets-Sheet 4 Kim? 17 Lzmdizmm' Patented Mar. 3, 1925.

Kara. warn-1 9% "sense ILLINOIS ravine MACHINE.

ApplicationfiledSeptember 15, 1922. Serial No. 588,745.

To alliwhom. it may concern:

Be it known that I, KNUT A. LUNns'rRoM, acitizen of the United States,residing at Seneca, in the State of *Illinois, have invented new and.useful Improvements in. Paving Machines, of which-the following isafull,clear, concise, andexactfdescription, refer= ence being had to theaccompanying. drawing, forming. a partof this-specification.

My inventionrelates to paving machines. One of .the objects of myinvention is to provide a paving machine which willlay the pavementquickly with. a 'minimum of manuallabor. 1

w A further :object. of invention is .to provide: a machine .which. willlay T a wh ole row of pavingrblocks or-bricks atl ail time.

A further;ob;iect-.-of-my invention: is to provide apaving machine whichwill lay a whole row of bricks at; a time andwpr-ess the row oft-brickssnugly against. the pavement already laid.

A further. object-of. my invention is to provide a paving machine whichis advanced by the act of'pre'ssing: the bricksfto belaid against. thoserallreadylaid;

A further object of my invention is-to provide a paving. machine .inwhich the bricks to be laid are carried on a floating support.

A furthenobject of: my invention is to provide a paving machine havingmeansto support a layer. of; bricks and meansifor withdrawing thissupporflfrom underneath the layer Ofi bricks.

A further. object.- or my invention. is to provide a paving'machinehaving means .for supporting. a layer of bricks, with. means. wherebythesupport may be Withdrawn from underneath th'e layer, ore-bricks and'the paving machineusimultaneously advanced.

Further objects will 1 appear: from the de-= tailed description tofollow and ifrom the .ap-. pended claims. 4

In the drawings, inwhich anembodiment otmy invention is shown,fFi-g. lis;a plan view of the paving. machine extending [from cur-b to vcjurb;vI l 5 Fig: 2.: is. a. rear, elevation of the machine, showing thecnrband iroadebedwin is'ection;

Fig. 3 is a perspectiveviewIshowing the, layer'ot bricksrestingl on theinclined floatv ing support;

Fig. 4,115. a. section on, theline: of

Fig-: i V I l I v l g; ,5: is. an .end view showin g .the,.-machine montedi o e ransportation;land

Fig. 6 is a perspective view of a detail of the bridge and conveyor.

Referringznow to the drawings in detail, the pa ing-machine showntherein comprises acarriage 10 mounted to travel on the curbs 11 and'12, and having an arched bridge 13 extending. from one side of thestreet to the other, for supporting-a row of paving blocks or bricks,aseries of pivotally mounted rearwardly extending inclined floatingfingers 14,;(pivotedat one end on the bridge 13, and having, the otherend floatabl'y resting on the; road-bed) for supporting a layer ofbricks extending from the bridge 13 to the road-bed, a recipr'ocabletransversely extending archecl:puslier-bar 15, -for engaging the roW ofbricks on the bridge 13, a vertically reciprocable guide-ban 16, (whichtogether withftheapusher-bar 15: forms a channel for the ipavingblocksor bricks as they are fed onto. the bridge lffi, and which when liftedpermits the pusher-bar 15 to engagethe row otbrick s on :the bridge topush the machine forward and press the bricks to be laid firmly againstthebricks already laid,) conveyoremeans 17; extending along one-half ofthe bridge l3,"for conveying the bricks along this bridge 13, mechanism18 forcontrolling the .moveme'nt'of'the pusher-bar 15, mecha nism 19-forcontrolling the movement of the vertically. reciprocable guidebar 15,and mechanism 20 .for controlling the conveyor mechanism 17. 2

Coming now to a more detailed descript-ionof-the various parts thusbroadly referred tonabove, the carriage 10 is provided with four rollerswhichrest onthe curbs 11- and 12, the front rollers 21 and 22 beingprovided with flanges 23 and 24 respectively, for-engaging the insideedges of the curbs, the rear rollers 25 and 26 not being providedwithflanges, but resting on top or" the curbs. In explanation ofthe provision of flanges on the front rollers and the fact that the rearrollers do not have flanges, it is stated that the front rollers are inadvance ofathelpart of the pavement which is laid,

so. that there is no pavement to interfere with-the flanges, while therear rollers are in;the rear of the pavement which'is laid, and-this.avement might interfere with the flanges. i 4

The'transversely extending arched bridge comprisesa pair of"arched-beams 27 and 28 extending between the end trucks 29land 30 onwhich.theLrollers22, 23,1 25-, and-26am mounted, these beams 27 and 28are serving as a support for the conveying mechanism 1? which liestherebetween.

The series of pivoted floating fingers 1 1 which together form afloating support for a layer of the bricks, are pivotally mounted at 31on brackets 32 secured to the rear of the beam 27.

In order to guide the layer of bricks and properly posi ion themlaterally, I provide a pair of spring guides 32 and 32 respec tively,the tension in the spring guide 32' being such as to cause it to bearagainst the adjacent curb, so that the bricks will be guided to liesnugly against the curb, the tension in the sprii finger 32 being suchas to bear on the adjacent edge of the layer of bricks and tend them toforce the layer of bricks over towards the curb on the opposite side ofthe street. Thus the layer of bricks will engage one curb snugly and anyspace between the layer of bricks and the curb on the opposite side maybe filled in by hand as the machine has done its work.

The mechanism 18 for controlling the pusherbar 15 comprises a pluralityof racks. 83, 34c, and 35, to which the pusher-bar 15 is secured, aplurality of pinions, 36, 37 and 38, meshing with the racksrespectively, a common shaft 39 upon which the pinions 36, 37 and 38 aremounted, and manually controllable mechanism 40 whereby the shaft 39 maybe caused to rotate in one direction or the other at will.

The pusher-bar 15 can thus be caused to move back and forth as desired.

The manually controllable mechanism 19 for controlling the raising andlowering of the guide-bar 16 comprises a hand-lever 11 and a pair ofcables 12 and 43, connected at it and 4-5 respectively to the ends ofthe guide-bar 16, suit-able pulleys being provided at 4:6, l? and 18, toguide the cables 12 and 13. Referring to Fig. 2 it will be seen thatmoving the lever 41 left will raise the guidebar 16, while moving it tothe right will permit it to lower under the influence of gravity.

The conveyor-mechanism 17 for advancing the bricks between thepusher-bar 15 and the guide-bar 16 comprises a series of rollers 419having circumferential grooves 50, and an endless cable or belt 51, theupper run of which lies in the grooves of the rollers 49.

The mechanism 20 for actuating this convevorcable 51, omprises a grooveddrive pulley 52, (Fig. a shaft 53 on which the pulley 52 is mounted, abevel-gear 54 mount ed on the shaft 53, a bevel-gear 55 meshing with thebevel-gear 54:, a shaft; 56 on which the bevel-gear 55 is mounted, asprocket 57 mounted on the shaft 56, a sprocket chain running over thesprocket 57, a sprocket 59 driving the sprocket chain 58, a shaft 60 -onthe shaft 6 1 hereinafter referred to.

on which the sprocket 59 is mounted, a

sprocketifillneu .c ,arrda sprocket chain 62 running over the sprocket61 and driven from the sprocket 63 mounted the pulley 52 drives thecable 51, the cable 51 lying in the rooves 50 of the rollers 19 causesthese rollers to revolve, and the cable 51 acting with the rollers 19causes the bricks to be advanced toward the middle of the bridge.

t will be noted that the cable 51 extends only to the middle of thebridge. There is no necessity for extending it farther, as the bridgebegins to slope downwardly from the middle and the bricks resting on theanti-friction. rollers are simply pushed along by the bricks resting onthe driven rollers 49, the bricks resting on the antifriction rollers 65being assisted in their movement by gravity.

Suitable mechanism is provided for driving the shaft 18 which controlsthe recipro cation of the push-bar 15, comprising a drive-pulley 66, a'shaft 67 on which the pulley 66 is mounted, a pinion 68 mounted on theshaft 67, a ear 69 meshing with the pinion 68, a shaft 0 on which thegear 69 is mounted, a sprocket 71 mounted on the shaft 70, a sprocketchain 72 running over the sprocket 71, a sprocket 7 3 driven from thesprocket chain 72, the shaft 61 hereinbefore referred to, on which thesprocket 73 is mounted, a bevel-gear 75 mounted on the shaft 64 and themanually controllable mechanism 10 hereinbefore referred to forcontrolling the direction of rotation of the shaft 18 at will.

The reversing mechanism 10 comprises'a hand-lever 76, pivoted at 77, alink 78, pivoted to the hand-lever 76, a lever 79 pivotally connectedwith the link 78, a clutch sleeve 80 movable back and forth by means ofthe lever 79, a shaft 81 on which the clutch-sleeve 80 is splined,oppositely rotating beveled pinions 82 and 83, loosely mountedon theshaft 81, and both meshing with the bevel-gear 7 5, a bevel-gear 8 1:mounted on the shaft 81, and a bevel-gear 85 on the shaft 39 and meshingwith the bevel-gear 84.

The above described transmission bet-ween the pulley 66 and the shaft 39which con trols the pusher-bar 15, is provided simply for the purpose ofenabling the shaft 13 to be driven in either direction at will, wheneverdesired, and any other transmissions which will accomplish the purposeequally as Well may be substituted.

The use and operation of the paving machine is as follows: 7

Assuming that the curbs 11 and 12 and the road-bed 86 have been preparedready for the paving blocks or bricks, the machine is placed in positionwith the rollers 21,

1 eater veyor. mechanism ,17, v is then. ,put in I motion ndbi' is' re'l 1 35 i0 al f y r, mechanism, 17, the bricks'bein g fed in at the righthand of the achine as Shawn, in Figs 1,. and 2,'f The brick'sare carriedto the left as shown in Figs. '1 and 2 by means of the conveyormechanism" 17 until a row' of bricks is formed extending completelyacross the bridge, the bricks" being pushed along after they leave thedriven rollers 4:9 by means of the bricks which are resting on theserollers.

As soon as a row of bricks extending across the bridge has been formedbetween the guide-bar 16 and the pusher-bar 15, the conveyor mechanism17 is thrown out of gear by means of a suitable clutch (not shown). Theguide-bar 16 is then lifted by moving the hand-lever 41 to the left asshown in Fig. 2, this guide-bar being thus raised to the position shownin Fig. 4. This gets the guide-bar 16 out of the way of the row ofbricks so that the pusher-bar 15 can be operated. The hand-lever 76which controls the operation of the pusher-bar 15 is then moved toaposition to cause the shaft '39 and pinions 37 to rotate in a directionwhich will tend to move the racks and pusher-bar 15 rearward. Thiscauses the pusher-bar 15 to bear on the bridge 13, and this pressurereacts on the'machine, to shove the machine forward, at the same timepushing the layer of bricks 87 resting on the floating platform snuglytogether and forcing the bricks which are at the extreme rear ends ofthe floating fingers 14 snugly against the bricks which are alreadylaid.

l/Vhen the machine has been pushed ahead a distance equal to thethickness of the row of bricks, the lever 76 is shifted to reverse thedirection of rotation of the shaft 39, causing the racks and pusher-bar15 to be moved ahead, out of the Way of the guidebar16. When the racks34: and pusher-bar 15 have been moved far enough ahead to get them outof the way of another row of bricks, the lever 7 6 is moved into neutralposition and the shaft 39, racks and pusher-bar 15 come to rest.

This cycle of operation described is then repeated, another row ofbricks being fed onto the bridge by means of the conveying mechanism 17,the guide-bar 16 being then lifted away, and the pusher-bar 15 shovedrearwardly to feed the machine ahead and with d wiiefltaa rg: out fromiiderne'- the r'ear lay'er ofibrlicksj' resting n it an d 'am this're'ai"' layer of bricks snugly against the:bricks already laid.

I i order to readily transportthe machine froiii onezplace to another,"I may; provide 1 Set Of wheels 8Swhich may reaag ily attachable anddetachable with r'e sipect to the pocketsfiS) in which theyare swivele'd. desired, 1 may also provide a readily attachable and detachabletongue or draft connection 90 for use in hauling the machine I from oneplace to another.

In irder that the machine may be made adjust b e i101. p ing; eet of dife e t widths, ll mayprovide i tran actions ss eve in... .g- 6... whery; conveyor, and ihe'fltatabi upport may be lengthened out. Toaccommodate this in-' sertable section, the bridge itself may be made insections, separable at any suitable point, (for instance, at the'middleof the bridge). When it is desired to lengthen out the bridge for awider street, the bridge may be disconnected at the middle and thesection shown in Fig. 6 inserted. This section will be provided with thefinger-supporting brackets 32 for supporting the floatable fingers 14.and will carry a set of conveyor rollers 65, between the beam sections27 and 28.

Any suitable means may be provided for connecting the sections together,such as connecting plates 88 and 89 provided with bolt-holes 90, throughwhich bolts may be inserted for securing the adjacent bridge sectionstogether.

It will thus be seen that I have devised an improved paving machinewhich requires a minimum of manual labor, in which the pavement can bequickly laid, and in which the paving bricks or blocks will be pressedfirmly together as they are laid.

lVhile I have shown but one embodiment of my invention, it is obviousthat it may be embodied in other forms covered and defined by theappended claims.

the bridge,

Having thus described my invention, what I claim as new and desire tosecure by Letters Patents of the United States is:

1. A paving machine comprising a carriage movable longitudinally of thestreet to be paved, a bridge supported on said carriage extendingtransversely of the street,

for supporting a row of paving blocks or bricks, rearwardly extendingsupporting I of bricks is pressed snugly against the pavement alreadylaid, and a guide bar co-operating With said pusher-bar to form achannelfor the roW of bricks on the bridge, said guide bar being movable from aposition in which it acts as a guide for the bricks to a position inwhich it is out of the Way of the bricks they are acted on by the pusherbar.

2. A paving machine comprising a carriage movable longitudinally of thestreet to be paved, floating means for supporting a layer of pavingblocks or bricks pivotally mounted at its front end on said carriage andwith its rear end floatably resting on the road-bed said layer extendingtransversely of the street.

3. A paving machine comprising a car riage movable longitudinally of thestreet to be paved, means for supporting a layer of paving blocks orbricks on said carriage, said layer extending transversely of thestreet, said supporting means comprising a plurality of fingers havingtheir ends floatably resting on the road-bed.

4. A paving machine comprising a carriage movable longitudinally of thestreet to be paved, rearWardly extending floating means for supporting alayer of paving blocks or bricks pivotally mounted at its front end onsaid carriage, said layer 6X- tending transversely of the street, andmeans for moving said supporting means from underneath said layer ofbricks.

In Witness whereof, I have hereunto subscribed my name.

KNUT A. DUNDSTROM.

